Interpreting experimental data on the electric explosion of thin wires in air

Pikuz, S. A.; Ткаченко, С. И.; Barishpol’tsev, D. V.; Ivanenkov, G. V.; Mingaleev, A. R.; Romanova, V. M.; Ter-Oganesyan, A. E.; Shelkovenko, T. A.

doi:10.1134/s1063785007080081

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…In the experiments on the explosion of fine wires with diameters of 13−50 μm performed over the past decade [6,11,[25][26][27][28][29][30], a variety of materials were used (Mg, Al, Ti, Fe, Ni, Cu, Mo, Pd, Ag, W, Pt, and Au, as well as nichrome and steel). Different EEW modes were studied, including those with a current pause and forced current interruption [6].…”

Section: Concept Of Two Groups Of Materials In Eew Experimentsmentioning

confidence: 99%

Electric explosion of fine wires: Three groups of materials

et al. 2015

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Experimental data demonstrating differences in the structures of channels formed during nanosecond discharges through fine wires made of different materials are presented. In addition to the traditional two classes of metals and alloys (the copper and tungsten groups), a new class is proposed to which materials of the nickel type belong. Their properties combine the characteristic properties of the two traditional groups, due to which they occupy an intermediate position between the latter. This manifests itself in the unstable character of explosion, the type of which can change drastically when changing the ambient medium or other conditions. Most of the reported results were obtained at a small setup with maximum values of the current and voltage of 10 kA and 20 kV, respectively, the current rise time being about 300 ns. An attempt is made to construct a scenario of the development of a nanosecond explosion that would make it possible to qualitatively describe the formation of the discharge channel structure. The analysis is based on the recent experimental results indicating that the cores formed in the course of the discharge have a tubular structure.

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Section: Concept Of Two Groups Of Materials In Eew Experimentsmentioning

confidence: 99%

Electric explosion of fine wires: Three groups of materials

et al. 2015

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“…The energy deposition into the wire material is also influenced by the medium due to its effect on the surface breakdown in explosion [27]- [29]. Refractory and nonrefractory metals have different regional distribution of the explosion products, and various developments of discharge channel and shock wave during the explosion in the air [17], [35]. The energy deposition is the source of the wire's state transformation in the explosion.…”

Section: Introductionmentioning

confidence: 99%

Effect of Subatmospheric Pressure on Deposited Energy for Electrical Wire Explosion in Air

Zhou¹,

Zhang

Liu

et al. 2014

IEEE Trans. Plasma Sci.

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Pressure is an important factor for the effect of the medium in the process of the electrical explosion of wire in air. In this paper, the electrical explosions of copper and aluminum wires at different air pressures in the range of subatmospheric pressure were investigated with pulsed voltage in a submicrosecond time scale. Based on the measurements of the current and voltage in wire explosion with a current monitor and a high-voltage probe, respectively, the deposited energy in the stages of melting, liquid state, and vaporization was calculated by mathematical methods. The effect of air pressure on deposited energy in the three stages mentioned above was analyzed by experiments and calculation. The results show that the breakdown field strength varied with air pressure, and plays a vital role in energy deposition and the time of duration in the vaporization stage. In addition, the exothermic reaction of Al microparticles and surrounding air also has an important effect on the energy deposition in the vaporization stage. The deposited energy in the electrical explosion of copper and aluminum wire is higher at the higher air pressure, particularly after the beginning of vaporization.

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“…Reports collected in the chapter [12] are the basis for understanding the physics of the phenomenon of explosion conductors. The theory of explosion of EEC together with similarity criterion reflecting the relationship of mode of energy release in a conductor during the explosion with its physical properties was used in the selection of parameters of EEC [13][14][15][16][17][18][19][20]. As shown in [14,15], input in EEC energy sufficient for sublimation of conductors was the main requirement.…”

Section: Introductionmentioning

confidence: 99%

“…The theory of explosion of EEC together with similarity criterion reflecting the relationship of mode of energy release in a conductor during the explosion with its physical properties was used in the selection of parameters of EEC [13][14][15][16][17][18][19][20]. As shown in [14,15], input in EEC energy sufficient for sublimation of conductors was the main requirement. Criterion for the optimal explosion of conductors in the case of capacitive storage as a pulsed energy source was considered in [17].…”

Section: Introductionmentioning

confidence: 99%

Results of Full Scale Modeling of Electromagnetic Pulse Impact for Lightning Protection of Power Plants

Фортов¹,

Шурупов²,

Zavalova³

et al. 2019

Power Plants in the Industry

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This chapter summarizes the results of experimental modeling of lightning impacts that has been carried out several years on the problem of lightning protection of electric power objects, including power plants, primarily in order to increase the stability of their work. The main purpose of the research is to offer the testing facilities and testing schemes of lightning protection. A feature of the models proposed to the attention is the use of the energy of an explosive magnetic generator (EMG). In the first part of the chapter, the investigation connects with direct lightning current impact. For this purpose, a prototype of mobile testing complex on the basis of an explosive magnetic generator (MTC EMG) was developed. The results of MTC EMG field testing for loads with ohmic resistances of 2-10 Ω in the form of current and voltage pulses are presented. The results of an electromagnetic impulse impact in the near field of lightning were modeled experimentally in the second part of the chapter. As a result, the electrical field strength with a rising of voltage front about 100 ns were up to 500 kV/m, and about 0.2 T/μs of the magnetic induction increasing were obtained in the experiments. The paper provides estimates of the techno-economic analysis of the practical application of the development.

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Interpreting experimental data on the electric explosion of thin wires in air

Cited by 8 publications

References 3 publications

Electric explosion of fine wires: Three groups of materials

Electric explosion of fine wires: Three groups of materials

Effect of Subatmospheric Pressure on Deposited Energy for Electrical Wire Explosion in Air

Results of Full Scale Modeling of Electromagnetic Pulse Impact for Lightning Protection of Power Plants

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